Suitable for both children and adultsMade of high-quality metal, has good wear resistance and texture in the hand, no sharp edgesIncludes 8 different puzzles to stimulate the brainChallenge players' critical thinking and problem-solving skills, and helps improve IQ and EQ.Cultivate children's concentration and endurance, improve children's hand-eye coordination and graphic recognitionPackage Contents 1 x Interlock Puzzle Set Material: Carbon Steel Wire Package Size: 21 x 13.5 x 2 cm